NL4303C - - Google Patents
Info
- Publication number
- NL4303C NL4303C NL4303DA NL4303C NL 4303 C NL4303 C NL 4303C NL 4303D A NL4303D A NL 4303DA NL 4303 C NL4303 C NL 4303C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE514322X | 1916-02-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL4303C true NL4303C (https=) |
Family
ID=6548641
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL3296D NL3296C (https=) | 1916-02-07 | ||
| NL4303D NL4303C (https=) | 1916-02-07 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL3296D NL3296C (https=) | 1916-02-07 |
Country Status (3)
| Country | Link |
|---|---|
| DE (3) | DE347614C (https=) |
| FR (2) | FR514322A (https=) |
| NL (2) | NL4303C (https=) |
-
0
- NL NL3296D patent/NL3296C/xx active
- DE DENDAT309946D patent/DE309946C/de active Active
- NL NL4303D patent/NL4303C/xx active
- DE DENDAT295931D patent/DE295931C/de active Active
-
1917
- 1917-02-06 FR FR514322A patent/FR514322A/fr not_active Expired
- 1917-10-11 FR FR22370A patent/FR22370E/fr not_active Expired
-
1920
- 1920-10-21 DE DE1920347614D patent/DE347614C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE309946C (https=) | |
| DE347614C (de) | 1922-01-23 |
| FR22370E (fr) | 1921-07-01 |
| FR514322A (fr) | 1921-03-08 |
| NL3296C (https=) | |
| DE295931C (https=) |